add min_speed

game/love_src/src/world/top_down_race/component/race.lua

@@ -5,6 +5,7 @@ local components = {}
 components.dict = {
   velocity = "race.velocity",
   max_speed = "race.max_speed",
+  min_speed = "race.min_speed",
   accel = "race.accel",
   grip = "race.grip",
   steer = "race.steer",
@@ -22,6 +23,10 @@ function components.max_speed (c, x)
   c.data = x
 end
 
+function components.min_speed (c, x)
+  c.data = x
+end
+
 function components.accel (c, x)
   c.data = x
 end

game/love_src/src/world/top_down_race/init.lua

@@ -32,13 +32,14 @@ function wrapper:load(_args)
       assemblage = racer.assemble,
       data = {
         velocity = {0.0, 0.0},
-        max_speed = 10.0,
+        max_speed = 1.0,
+        min_speed = 0.0,
         inertia = {0.0, 0.0},
 
-        accel = 0.0,
+        accel = 0.1,
-        brake = 0.0,
+        brake = 0.1,
         grip = 0.0,
-        steer = 0.0,
+        steer = 0.1,
         mass = 0.0,
         streamline = 0.0
       }

game/love_src/src/world/top_down_race/system/velocity.lua

@@ -14,6 +14,7 @@ system.__index = system
 system.pool = {
   pool = {
     race.dict.max_speed,
+    race.dict.min_speed,
     race.dict.velocity,
     race.dict.accel,
     race.dict.brake,
@@ -27,6 +28,7 @@ system.pool = {
 
 system.components = {
   [race.dict.max_speed] = race.max_speed,
+  [race.dict.min_speed] = race.min_speed,
   [race.dict.velocity] = race.velocity,
 
   [race.dict.accel] = race.accel,
@@ -53,6 +55,7 @@ end
 local function get(e)
   return
     e[race.dict.max_speed].data,
+    e[race.dict.min_speed].data,
     e[race.dict.velocity].data,
     e[race.dict.accel].data,
     e[race.dict.brake].data,
@@ -141,8 +144,8 @@ end
 local magic_w = {
   tire = 0.0,
   floor = 0.0,
-  forward = 0.0,
+  forward = 0.01,
-  steer = 0.0,
+  steer = 0.1,
   drag_boost = 0.0,
   drag_halt = 0.0,
   inertia = 0.0,
@@ -179,6 +182,7 @@ local p_right = love.keyboard.isDown("l")
 
 dict_debugs = {
   race.dict.max_speed,
+  race.dict.min_speed,
   race.dict.velocity,
   race.dict.accel,
   race.dict.brake,
@@ -218,7 +222,7 @@ function system:update(dt)
       e[dict_debug_current].data = e[dict_debug_current].data + 1
     end
 
-    local max_speed, velocity, accel, brake, grip, steer, inertia, mass, streamline = get(e)
+    local max_speed, min_speed, velocity, accel, brake, grip, steer, inertia, mass, streamline = get(e)
 
     local pos_x, pos_y = e["race.pos"].data[1], e["race.pos"].data[2]
 
@@ -245,8 +249,10 @@ function system:update(dt)
     local a = force * dt / mass
 
     e[race.dict.velocity].data = e[race.dict.velocity].data + a
-    e[race.dict.velocity].data[1] = vm.clamp(e[race.dict.velocity].data[1], -max_speed, max_speed)
+    e[race.dict.velocity].data[1] = vm.clamp(e[race.dict.velocity].data[1], min_speed, max_speed)
+    if (desire_forward ~= 0) then
       e["race.pos"].data = e["race.pos"].data + e[race.dict.velocity].data
+    end
 
     e[race.dict.inertia].data = force
   end
@@ -271,9 +277,10 @@ end
 
 function system:ui_draw()
   for _, e in ipairs(self.pool) do
-    local max_speed, velocity, accel, brake, grip, steer, inertia, mass, streamline = get(e)
+    local max_speed, min_speed, velocity, accel, brake, grip, steer, inertia, mass, streamline = get(e)
     draw_debug(640, 0, 1.0, 0.0, 1.0, {
       string.format("%s max_speed : %s", (debug_current == 1 and ">") or "", max_speed),
+      string.format("%s max_speed : %s", (debug_current == 21 and ">") or "", min_speed),
       string.format("%s velocity : %s", (debug_current == 2 and ">") or "", velocity),
       string.format("%s accel : %s", (debug_current == 3 and ">") or "", accel),
       string.format("%s brake : %s", (debug_current == 4 and ">") or "", brake),

game/love_src/src/world/top_down_race/template/racer.lua

@@ -5,6 +5,7 @@ local template = {}
 template.default_data = {
   velocity = {0.0, 0.0},
   max_speed = 10.0,
+  min_speed = 0.0,
 
   accel = 10.0,
   brake = 10.0,
@@ -16,6 +17,7 @@ template.default_data = {
 }
 function template.assemble(e, data)
   e:give(race.dict.max_speed, data.max_speed)
+  e:give(race.dict.min_speed, data.min_speed)
   e:give(race.dict.velocity, data.velocity[1], data.velocity[2])
 
   e:give(race.dict.accel, data.accel)